Fully-sealed backlight electronic shielding control box

Abstract

The utility model discloses a fully-sealed backlight electronic shielding control box, which relates to the field of electronic shielding devices and comprises a box body with two open ends and a control board arranged inside; the backlight control panel covers the opening in one end of the box body in a sealing manner and can perform backlight illumination; the back plate covers the opening in the other end of the box body in a sealing manner; wherein an operation switch is arranged on the backlight control panel, and the control panel is used for receiving operation information of the operation switch, converting the operation information into a control command and transmitting the control command to the instrument equipment so as to control the instrument equipment. According to the utility model, the backlight control panel and the back plate are respectively arranged with the box body in a sealing manner, so that the sealing performance and the electromagnetic compatibility are improved under the condition that the function of backlight illumination is ensured, namely, the accuracy and the accuracy of signal transmission are ensured.

Description

Technical Field

[0001] The utility model relates to the field of electronic shielding devices, and particularly to a fully sealed backlight electronic shielding control box. Background Art

[0002] An electronic shielding control box is an advanced electronic device designed specifically for electromagnetic compatibility issues in modern high-tech environments. With the continuous improvement of the integration level of electronic devices and the increasing complexity of application scenarios, electromagnetic interference (EMI) has become a key factor affecting the performance and reliability of devices. To solve this problem, electronic shielding control boxes have emerged. By integrating precise control switches and efficient electromagnetic shielding technologies, they provide a stable and reliable operating platform for electronic devices. The interior of an electronic shielding control box usually contains multiple layers of printed circuit boards (PCBs), which not only carry control logic but also optimize electromagnetic compatibility through special layouts and materials. The coordinated operation of various components such as the box body of the control box forms an efficient and reliable electromagnetic shielding system, meeting the requirements of modern electronic devices for high-performance electromagnetic compatibility.

[0003] In recent years, with the development of technology, the integration level of electronic devices has become higher and higher. To enable operators to quickly and accurately control instrument devices under low-light or no-light conditions, designers have combined some control switches into a control box for easy operation and designed backlight illumination on the control box. However, due to the presence of control switches and backlight illumination, the backlight control box has poor sealing performance and electromagnetic compatibility. Especially when there is high-power output, the electromagnetic compatibility effect deteriorates significantly, and the control box cannot well adapt to complex electromagnetic environments. To meet the new requirements of devices for backlight control boxes and better adapt to the increasingly complex electromagnetic environments of electromechanical devices, a new type of fully sealed backlight control box structure needs to be designed.

[0004] In view of this, this application is specifically proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a fully sealed backlight electronic shielding control box. The control box seals the backlight control panel and the back panel with the box body respectively, and solves the problems of poor sealing performance and electromagnetic compatibility in the prior art while ensuring the function of backlight illumination.

[0006] The embodiment of the utility model is realized through the following technical solutions: A fully sealed backlight electronic shielding control box, comprising:

[0007] A box body with openings at both ends and a control board arranged inside;

[0008] A backlight control panel, which is hermetically covered on one opening end of the box body and can perform backlight illumination;

[0009] The backplane is hermetically covered on the opening at the other end of the box body;

[0010] Among them, an operation switch is arranged on the backlight control panel. The control board is used to receive the operation information of the operation switch and can convert the operation information into a control command to be transmitted to the instrument and equipment to realize the control of the instrument and equipment.

[0011] Preferably, the backlight control panel includes:

[0012] The lighting PCB board, and surface-mounted lamp beads connected to the power supply are arranged on the upper surface of the lighting PCB board;

[0013] The mounting plate includes a counterbore mechanism in the middle. The outer edge of the mounting plate is connected to the lower surface of the lighting PCB board, and there is a gap between the lighting PCB board and the counterbore mechanism;

[0014] The light guide panel is made of a transparent material. The light guide panel is arranged on the upper surface of the lighting PCB board and conducts the light energy of the surface-mounted lamp beads;

[0015] The pressing plate is arranged outside the light guide panel to press the light guide panel and the lighting PCB board tightly between the mounting plate and the pressing plate.

[0016] Preferably, a surface-mounted resistor is arranged on the lighting circuit of the surface-mounted lamp beads, and the resistance value of the surface-mounted resistor is adjustable.

[0017] Preferably, a copper film is arranged outside the lighting PCB board, and a tin-plated film is arranged around the periphery. The tin-plated film is conductively connected to the copper film. When the lighting PCB board is connected to the outer edge of the mounting plate, the tin-plated film and the mounting plate can form an equipotential body.

[0018] Preferably, through holes are arranged on the backlight control panel, and the operation switch is installed in the through holes;

[0019] A pressure cap is sleeved outside the operation switch, and the pressure cap presses the operation switch in the through hole.

[0020] Preferably, the pressure cap is threadedly connected to the operation switch, and a sealing ring is arranged between the pressure cap and the inner side wall of the through hole.

[0021] Preferably, a sealing gasket is arranged at the bottom of the operation switch. The sealing gasket is arranged outside the through hole and can hermetically cover the lower opening of the through hole.

[0022] Preferably, a feedthrough capacitor conductively connected to the lighting PCB board is arranged on the mounting plate. The connection signal line of the operation switch is connected to the feedthrough capacitor, and the feedthrough capacitor is used to connect the operation switch and the lighting PCB board in signal.

[0023] Preferably, conductive sealing rubber strips are arranged on the connection surface between the backlight control panel and the box body, and conductive sealing rubber strips are arranged on the connection surface between the backplane and the box body.

[0024] Preferably, an aviation plug is provided on the back panel, which is connected to the control board. The aviation plug is used to transmit control instructions to the instrument and equipment to realize the control of the instrument and equipment.

[0025] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0026] 1. The fully sealed backlight electronic shielding control box provided by the present invention has a control panel installed in a box with two openings at both ends. The two openings of the box are sealed by the backlight control panel and the back panel, respectively. This not only provides excellent sealing performance, but also ensures normal backlighting, ensuring that the functional characters and lines on the backlight control panel are clearly visible in dim or no light conditions, allowing operators to quickly and accurately control instruments and equipment through operating switches. The backlight control panel is provided with operating switches for controlling instruments and equipment. The control box has excellent sealing and electromagnetic shielding performance, which improves the precision and accuracy of signal transmission.

[0027] 2. The backlight control panel of the present invention includes a lighting PCB board, a mounting plate, a light guide panel and a pressure plate. The lighting PCB board is provided with SMD lamp beads as a light source. The light guiding effect of the light guide panel ensures that the functional characters and lines of the backlight control panel are clearly visible in dim light or no light, ensuring that the operator can quickly and accurately control the instrument equipment through the control box. The mounting plate and the pressure plate jointly provide support and compression, thereby improving the stability of the entire structure. Setting the mounting plate layer platform can not only ensure that the outer edge of the mounting plate is connected to the lighting PCB board, but also ensure that there is a gap between the mounting plate and the lighting PCB board, providing insulation guarantee and preventing the lighting PCB board circuit from short-circuiting. The adjustable setting of the SMD resistor can adjust the current of the SMD lamp bead lighting circuit, thereby adjusting the lighting brightness of the SMD lamp bead.

[0028] 3. The copper film and tin-plated film are set on the lighting PCB board, and the copper film and the tin-plated film are conductively connected. When the lighting PCB board is connected to the outer edge of the mounting plate, the tin-plated film and the mounting plate can form an equipotential body, which has a good electromagnetic shielding effect.

[0029] 4. Set a through-hole capacitor on the mounting plate. The through-hole capacitor connects the operating switch and the lighting PCB board signal. That is, the signal connection between the operating switch and the lighting PCB board is transmitted through the through-hole capacitor, preventing the control board signal in the box from being transmitted through the wire hole on the mounting plate or the wire between the switch and the lighting PCB board. It also ensures that external electromagnetic signals cannot enter the box and interfere with the control PCB board inside the box.

[0030] Generally speaking, in the embodiment of the present utility model, the fully sealed backlight electronic shielding control box seals the backlight control panel and the backplane with the box body respectively. While ensuring the function of backlight illumination, the sealing performance and electromagnetic compatibility are improved, that is, the accuracy and precision of signal transmission are ensured. Description of the Drawings

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can be obtained based on these drawings.

[0032] Figure 1 Structural diagram of the control box provided by the embodiment of the present utility model;

[0033] Figure 2 Schematic structural diagram of the backlight control panel provided by the embodiment of the present utility model;

[0034] Figure 3 Cross-sectional structural diagram of the control box provided by the embodiment of the present utility model;

[0035] Figure 4 Schematic structural diagram of the operation switch provided by the embodiment of the present utility model.

[0036] Marks in the drawings and corresponding component names:

[0037] 1 - Box body, 2 - Control board, 3 - Backlight control panel, 4 - Backplane, 5 - Operation switch, 6 - Through hole, 7 - Compression cap, 8 - Sealing ring, 9 - Sealing gasket, 10 - Feedthrough capacitor, 11 - Conductive sealing strip, 31 - Lighting PCB board, 32 - Mounting plate, 33 - Light guide panel, 34 - Pressing plate. Detailed Embodiment

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Generally, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0040] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0041] In the description of the present invention, it should be noted that the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0042] Embodiment

[0043] An embodiment of the present invention provides a fully sealed backlight electronic shielding control box, as Figure 1 and Figure 3 shown, including:

[0044] A box body 1 with openings at both ends, and a control board 2 is arranged inside; the box body 1 is made of a metal material, which can effectively shield electromagnetic interference, protect the internal PCB control board 2 from external electromagnetic waves, and at the same time prevent the electromagnetic waves generated by the device itself from interfering with the outside; a backlight control panel 3, which is hermetically covered on one opening end of the box body 1 and can perform backlight illumination; this panel can not only operate the switch, but also perform backlight illumination, ensuring that the function characters and lines of the control panel are clearly visible in low light or no light conditions, so that users can accurately operate the device in a dim environment; a back plate 4, which is hermetically covered on the other opening end of the box body 1; the two opening ends of the box body 1 are hermetically covered by the backlight control panel 3 and the back plate 4 respectively, ensuring that the inside of the control box is isolated from the external environment and has good waterproof and dustproof performance.

[0045] Among them, an operation switch 5 is provided on the backlight control panel 3. The control board 2 is a PCB control board, which is used to receive the operation information of the operation switch 5 and can convert the operation information into a control command and transmit it to the instrument and equipment to realize the control of the instrument and equipment. This function can be realized by using an existing PCB control board to receive, convert, and send control commands, and no more elaboration will be made here. The control board 2 receives the operation signal and processes it to ensure that the operation information can be accurately converted into a control command to realize the control of the instrument and equipment. The structural design of the control box takes into account electromagnetic compatibility and sealing performance, and uses metal materials such as aluminum to achieve a good electromagnetic shielding effect. This fully sealed backlight electronic shielding control box can be widely used in occasions that require high electromagnetic compatibility and environmental protection, such as military, aerospace, medical equipment and other fields, and is an important component to ensure the stable operation of key electronic equipment.

[0046] Furthermore, as Figure 2As shown, the backlight control panel 3 includes: an illumination PCB board 31, on the upper surface of which surface-mounted lamp beads connected to a power supply are provided; a multi-layer PCB board design can generally be adopted. The upper surface of the PCB board is equipped with surface-mounted lamp beads, which are connected to the power supply and provide light sources; a mounting plate 32, including a counterbore mechanism in the middle, the outer edge of the mounting plate 32 is connected to the lower surface of the illumination PCB board 31, and there is a gap between the illumination PCB board 31 and the counterbore mechanism; the mounting plate 32 serves as the base of the backlight control panel 3 and can be made of a thin metal plate. The mounting plate 32 is connected to the lower surface of the illumination PCB board 31 while maintaining a gap between the PCB board and the counterbore mechanism, which helps to ensure the insulation between the illumination PCB board 31 and the mounting plate 32 and prevent short circuits; a light guide panel 33, made of a transparent material such as plexiglass or transparent plastic, the light guide panel 33 is arranged on the upper surface of the illumination PCB board 31 and conducts the light energy of the surface-mounted lamp beads; specifically, the function of the light guide panel 33 is to evenly conduct and distribute the light energy emitted by the surface-mounted lamp beads to ensure uniform brightness of the entire control panel and improve visibility; a pressing plate 43, arranged outside the light guide panel 33, pressing the light guide panel 33 and the illumination PCB board 3 between the mounting plate 32 and the pressing plate 43. The pressing plate 43 can be made of a metal plate, arranged outside the light guide panel 33, and the light guide panel 33 and the illumination PCB board 3 are pressed between the mounting plate 32 and the pressing plate 43 by screws or other fasteners to form a sealed structure, ensuring the stability of the components and the overall sealing performance. In the embodiment of the present utility model, the light emitted by the surface-mounted lamp beads is conducted by the light guide panel 33 and evenly dispersed to each part of the control panel through its transparent material. The uniform light guiding characteristic of the light guide panel 33 ensures the consistency and clarity of the backlight illumination, enabling the operation buttons and markings to be clearly recognized even in a low-light environment. The tight fit between the pressing plate 43 and the mounting plate 32 not only ensures the structural stability but also prevents potential impacts of external environmental factors on the internal circuit through the sealing design. The design of the counterbore mechanism provides the necessary space gap to achieve good insulation and heat dissipation performance, and also avoids short circuit problems caused by poor contact.

[0047] As a preferred embodiment of the present utility model, a chip resistor is provided on the lighting circuit of the chip LED lamp bead. The resistance value of the chip resistor is adjustable. In the lighting circuit of the backlight control panel 3, the chip LED lamp bead and the chip resistor work together to achieve precise brightness control. The chip LED lamp bead provides light source, while the chip resistor is used to limit the current flowing through the lamp bead to prevent damage to the lamp bead due to excessive current and ensure its operation within a safe rated value. The resistance value of the chip resistor is adjustable, and this setting allows the operator to adjust the brightness according to actual needs. For example, if the brightness needs to be reduced, the resistance value can be increased; on the contrary, if the brightness needs to be increased, the resistance value can be reduced. This adjustment can be achieved by replacing resistors with different resistance values or using variable resistors (such as potentiometers). In addition, for RGB LED lamp beads, it may be necessary to set appropriate resistors for each color of LED respectively to ensure the desired color effect when mixed. For example, the red LED may require different resistance values to match the green and blue LEDs to ensure color balance in the white light mode.

[0048] To further improve the shielding effect of the control box, a copper film can be provided on the outer side of the lighting PCB board 31, and a tin plating film is provided around it. The tin plating film is conductively connected to the copper film. When the outer edge of the lighting PCB board 31 is connected to the mounting board 32, the tin plating film and the mounting board 32 can form an equipotential body. Specifically, the copper film, as the conductive layer of the PCB board, provides good electrical connection performance. When the outer edge of the lighting PCB board 31 is connected to the mounting board 32, the tin plating film and the mounting board 32 form an equipotential body, ensuring the continuity and stability of the circuit. Forming an equipotential body helps reduce electromagnetic interference because the nature of the equipotential body means that the electric potential is uniform between the connected conductors, reducing the potential difference and thus reducing the generation of electromagnetic fields. The tin plating provides additional protection to prevent the copper film from oxidizing or corroding in a humid or corrosive environment, extending the service life of the PCB board. The thermal conductivity of copper and tin helps dissipate the heat generated by the LED lamp beads and maintain the stable operating temperature of the circuit.

[0049] To further improve the tightness of the control box, such as Figure 4As shown, a through hole 6 is provided on the backlight control panel 3, and the operation switch 5 is installed in the through hole 6; a compression cap 7 is sleeved outside the operation switch 5, and the compression cap 7 presses the operation switch 5 in the through hole 6. The through hole 6 on the backlight control panel 3 provides an accurate installation position for the operation switch 5, ensuring that the corresponding layout of each switch and the panel is accurate. The operation switch 5 is installed in the through hole 6, and the size and shape of the through hole 6 are closely matched with the switch, ensuring the stability of the switch and the accuracy of operation. The compression cap 7 sleeved outside the operation switch 5 plays a fixing role, firmly pressing the operation switch 5 in the through hole 6 to prevent the switch from shifting due to vibration or external force. The combination of the compression cap 7 and the operation switch 5 also provides a sealing function, preventing environmental factors such as dust and moisture from entering the control box through the switch installation part, and improving the protection level of the control box. Preferably, the compression cap 7 is threadedly connected to the operation switch 5, and a sealing ring 8 is provided between the compression cap 7 and the inner side wall of the through hole 6. The operation switch 5 is connected to the compression cap 7 by threads, which not only provides convenient installation and disassembly, but also ensures that the operation switch 5 is firmly fixed in the through hole 6, preventing loosening due to vibration or impact. Setting the sealing ring 8 between the compression cap 7 and the inner side wall of the through hole 6 can effectively prevent external moisture, dust and other environmental factors from entering the control box. The sealing ring 8 can be made of an elastic material, which can form a tight seal between the compression cap 7 and the through hole 6, improving the protection level of the control box. More preferably, a sealing gasket 9 is provided at the bottom of the operation switch 5. The sealing gasket 9 is arranged outside the through hole 6 and can seal the lower opening of the through hole 6. The sealing gasket 9 is placed at the bottom of the operation switch 5 and is located outside the through hole 6, so that a sealing layer can be formed between the switch and the through hole 6, effectively preventing dust, moisture and other external substances from entering the control box. The sealing gasket 9 can be made of an elastic material, such as rubber or silica gel. The sealing gasket 9 is used to seal the lower opening of the through hole 6, so that even after the operation switch 5 is installed, the lower part of the through hole 6 will not be exposed, thus ensuring the sealing of the entire control panel. The compression cap 7, the sealing ring 8 and the sealing gasket 9 of the operation switch 5 work together to provide multiple sealing guarantees. The compression cap 7 ensures the sealing of the switch itself, while the sealing gasket 9 ensures the sealing of the area around the switch.

[0050] As a preferred embodiment of the present utility model, a feedthrough capacitor 10 electrically connected to the lighting PCB board 31 is provided on the mounting plate 32. The connection signal line of the operation switch 5 is connected to the feedthrough capacitor 10, and the feedthrough capacitor 10 is used to signal-connect the operation switch 5 and the lighting PCB board 31. The use of the feedthrough capacitor 10 helps to improve the electromagnetic compatibility of the control box. Since the feedthrough capacitor 10 is directly mounted on the metal panel, its grounding inductance is smaller and there is almost no influence of lead inductance, thereby reducing the electromagnetic interference during signal transmission. Of course, a conductive sealing strip 11 can also be provided on the connection surface between the backlight control panel 3 and the box body 1, and a conductive sealing strip 11 can be provided on the connection surface between the back plate 4 and the box body 1. The conductive sealing strip 11 can provide a continuous conductive path, which helps to form an equipotential body, and limits the electromagnetic wave inside the control box through the eddy current effect and reflection effect, thereby preventing the electromagnetic wave from leaking and causing radiation, and improving the overall electromagnetic shielding performance. When the conductive sealing strip 11 connects the panel and the box body 1, it not only provides electrical connection, but also has a sealing function, which can prevent environmental factors such as water vapor and dust from invading the inside of the control box and protect the internal components from damage. In the embodiment of the present utility model, a circular connector is provided on the back plate 4, and the circular connector is connected to the control board 2. The circular connector is used to transmit control instructions to the instrument and equipment to realize the control of the instrument and equipment. Through the connection of its plug and socket, the circular connector provides an electrical path for power supply and signal transmission for the control board 2, ensuring that the control instructions can be transmitted to the instrument and equipment. Since the circular connector is usually designed with functions such as shock resistance, waterproofness, and dustproofness, it can ensure stable transmission of control instructions in harsh environments.

[0051] Exemplarily, as Figures 1-4 shown, the control box of the embodiment of the present utility model includes a backlight control panel 3, a control PCB board (control board 2), a box body 1, a back plate 4, a conductive sealing strip 11 and connection screws. Specifically, it is a switch integrated control box, which can integrate the operation switch 5 of the electronic device. The box body is fully sealed, waterproof, dustproof and has excellent electromagnetic shielding performance. The control panel on the control box has a backlight function, with high backlight brightness, low energy consumption and good light uniformity.

[0052] The operation switch 5 of the electronic device is integrated on the backlight control panel 3. The control panel is provided with a backlight illumination mechanism, which allows the operator to accurately operate the instrument and equipment using the control box in a low-light or lightless environment. The backlight control panel 3 mainly consists of a mounting plate 32, an illumination PCB board 31, an operation switch 5, a light guide panel 33 and a pressing plate 43. The mounting plate 32 is made of a thin metal plate and serves as the base plate of the backlight control panel 3. A through hole 6 is opened at the position where the operation switch 5 is installed. A feedthrough capacitor 10 is installed around the through hole 6. The signal line of the operation switch 5 is connected to the feedthrough capacitor 10. The other end of the feedthrough capacitor 10 is soldered to the illumination PCB board 31. The signal connection between the operation switch 5 and the illumination PCB board 31 is conducted through the feedthrough capacitor 10, preventing the signal of the control board 2 in the box body 1 from being conducted out through the wire holes on the mounting plate 32 or the wires between the operation switch 5 and the illumination PCB board 31, and also ensuring that external electromagnetic signals cannot enter the box body 1 to interfere with the control PCB board in the box body 1. The mounting plate 32 is in the shape of a sunken platform, and the stepped surface is tightly connected to the tin film around the illumination PCB, ensuring that the ground of the illumination PCB board 31 is connected to the mounting plate 32 and strengthening the electromagnetic shielding performance of the control box. There is a sunken platform in the middle of the mounting plate 32 to ensure that there is a gap between the illumination PCB board 31 and the mounting plate 32 for insulation between the illumination PCB board 31 and the mounting plate 32 to prevent the short circuit of the lines on the illumination PCB board 31.

[0053] The illumination PCB board 31 is a multi-layer PCB board. The control board 2 traces are arranged in the middle layer of the PCB board, and the copper films are arranged in the outer layer. The periphery of the PCB board is plated with a tin film, and the tin film is conductively connected to the copper film. When the PCB board is tightly connected to the mounting plate 32, the tin film and the mounting plate 32 will form an equipotential body, having a good electromagnetic shielding effect. SMD resistors and SMD lamp beads are soldered on the illumination PCB board 31. The color and brightness of the panel are realized by adjusting the size of the SMD resistor and the color of the lamp bead.

[0054] The light guide panel 33 is made of organic glass, and the text and logo introducing the switch function or control area are engraved on the front. The switch partition lines are sprayed with light-transmitting paint, and the rest of the area is sprayed with opaque paint (the color is adjusted according to requirements). On the back of the light guide panel 33, counterbores are opened at the corresponding positions of the LED lamp beads (SMD lamp beads) on the illumination PCB board 31. The depth of the counterbore is 3-4 mm, the periphery of the counterbore is not painted, and the bottom surface of the counterbore is sprayed with light-shielding paint. The LED lamp beads (SMD lamp beads) transmit the light source through the light guide of the side wall of the organic glass through the light-transmitting paint.

[0055] The pressing plate 43 is a metal plate, which is connected to the mounting plate 32 by screws and wraps the light guide panel 33 and the illumination PCB board 31 therein. A sealing glue is applied to the mating surface between the pressing plate 43 and the light guide panel 33 to prevent water vapor from entering the space where the illumination PCB board 31 is located through the gap between the pressing plate 43 and the light guide panel 33, ensuring that the illumination PCB board 31 will not be short-circuited due to water ingress.

[0056] The operation switch 5 used on the backlight control panel 3 is a sealed shield switch. During installation, a self-made switch installation compression cap 7 is used in combination with an O-ring to form a sealed structure, ensuring the sealing performance of the control box and the backlight control panel 3.

[0057] Both the upper and lower surfaces of the control box body 1 are provided with annular sealing grooves, and conductive sealing rubber strips 11 are installed in the annular grooves to ensure the sealing and electrical conductivity between the box body 1 and the backlight control panel 3, as well as between the back plate 4 and the box body 1.

[0058] The back plate 4 is a metal flat plate, and the mating surface with the box body 1 has a raised skirt. The skirt has a clearance fit with the inner cavity of the box body 1, with a height of 1.5 - 2 mm. The back plate 4 presses the conductive rubber strip in the annular groove of the box body 1 through screws and is connected to the box body 1 together.

[0059] The control board 2 (control PCB board) is installed on the back plate 4 (in other embodiments, it can also be directly installed on the inner wall of the box body 1). It collects the operation signals of the operation switch 5 on the backlight control panel 3, processes the signals, and transmits the control commands to the instrument and equipment through a aviation plug to control the instrument and equipment. The aviation plug is installed on the back plate 4, and a conductive rubber pad is installed between the aviation plug and the back plate 4 to ensure the sealing and electromagnetic shielding at the installation interface of the aviation plug.

[0060] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention. It should be noted that the structures or components illustrated in the drawings are not necessarily drawn to scale, and the present invention omits the description of well-known components, processing technologies, and processes to avoid unnecessarily limiting the present invention.

Claims

1. A fully sealed backlight electronic shielding control box, characterized in that, Comprising: A box body (1) with openings at both ends and a control board (2) arranged inside; A backlight control panel (3) hermetically covering the opening at one end of the box body (1) and capable of performing backlight illumination; A back plate (4) hermetically covering the opening at the other end of the box body (1); Wherein, an operation switch (5) is arranged on the backlight control panel (3), and the control board (2) is used to receive the operation information of the operation switch (5) and can convert the operation information into a control command for transmission to the instrument device to realize the control of the instrument device.

2. The fully sealed backlight electronic shielding control box according to claim 1, characterized in that The backlight control panel (3) includes: An illumination PCB board (31) with surface-mounted lamp beads connected to the power supply arranged on the upper surface thereof; A mounting plate (32) including a counterbore mechanism in the middle, the outer edge of the mounting plate (32) is connected to the lower surface of the illumination PCB board (31), and there is a gap between the illumination PCB board (31) and the counterbore mechanism; A light guide panel (33) made of a transparent material, the light guide panel (33) is arranged on the upper surface of the illumination PCB board (31) and conducts the light energy of the surface-mounted lamp beads; A pressing plate (34) arranged outside the light guide panel (33) to press the light guide panel (33) and the illumination PCB board (31) between the mounting plate (32) and the pressing plate (34).

3. A fully sealed backlight electronic shielding control box according to claim 2, characterized in that, A surface-mounted resistor is arranged on the illumination circuit of the surface-mounted lamp beads, and the resistance value of the surface-mounted resistor is adjustable.

4. The fully enclosed backlight electronic shielding control box according to claim 2, characterized in that, A copper film is arranged outside the illumination PCB board (31), and a tin-plated film is arranged around the periphery, and the tin-plated film is electrically connected to the copper film. When the illumination PCB board (31) is connected to the outer edge of the mounting plate (32), the tin-plated film and the mounting plate (32) can form an equipotential body.

5. A fully sealed backlight electronic shielding control box according to claim 1, characterized in that, A through hole (6) is arranged on the backlight control panel (3), and the operation switch (5) is installed in the through hole (6); A compression cap (7) is sleeved outside the operation switch (5), and the compression cap (7) presses the operation switch (5) in the through hole (6).

6. The fully sealed backlight electronic shielding control box according to claim 5, characterized in that, The compression cap (7) is threadedly connected to the operation switch (5), and a sealing ring (8) is arranged between the compression cap (7) and the inner side wall of the through hole (6).

7. A fully sealed backlight electronic shielding control box according to claim 6, characterized in that, A sealing gasket (9) is arranged at the bottom of the operation switch (5), the sealing gasket (9) is arranged outside the through hole (6) and can hermetically cover the lower opening of the through hole (6).

8. A fully sealed backlight electronic shielding control box according to claim 2, characterized in that, A feedthrough capacitor (10) with electrical connection is arranged on the mounting plate (32), the connection signal line of the operation switch (5) is connected to the feedthrough capacitor (10), and the feedthrough capacitor (10) is used to signal-connect the operation switch (5) and the illumination PCB board (31).

9. The fully sealed backlight electronic shielding control box according to claim 1, wherein A conductive sealing strip (11) is arranged on the connection surface between the backlight control panel (3) and the box body (1), and a conductive sealing strip (11) is arranged on the connection surface between the back plate (4) and the box body (1).

10. A fully sealed backlight electronic shielding control box according to claim 1, characterized in that, An aviation plug is provided on the backplane (4), and the aviation plug is connected to the control board (2). The aviation plug is used to transmit control instructions to the instrument and equipment to realize the control of the instrument and equipment.

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